Boring-bit gage



W. P. BUTTER. Boring Bit Gage.

No. 232,851. Patented Oct. 5,1880..

PATENT UEEICE.

WILLIAM F. BUTTER, OF ATLANTIC CITY, NEW JERSEY.

BORING-BIT GAGE.

SPECIFICATION forming part of Letters Patent No. 232,851, dated October5, 1880.

Application tiled February 7, 1880.

To all whom it may Vconcern Be it known that I, WILLIAM F. BUTTER, acitizen of the United'Sta tes, residing at Atlantic City, in Atlanticcounty, and State of New Jersey, have invented a new and usefulImprovement in Boring-Bit Gages, of which the following is aspecication.

My invention consists of an adjustable gagebar having a foot adapted tobear upon the surface oi" the wood to be bored to arrest t-he action ot'the boring-bit when the hole` has been bored to the requisite depth, incombination with the bit and clamp for connecting the gage-bar with thebit and an index-slide and set and conlining screws, the said bar havinga longitudinal slot, with which lugs ol' the index-slide are connected,whereby the quick and accurate adj ustment of the gage is effected, ashereinafter full y described.

In the accompanying drawings, which make a part ot' this specification,Figure l is a face viewof the gage-bar B, in connect-ion with thebrace-bitA Iand index-slide C. Fig. 2 is an edge view of the bar B,slide C, and clamp D, in connection with the bitA. Fig. 3 is anisometrical view ot' the clamp D. I

Lilie letters ot' reference in all the ligures indicate the same parts.

A represents a bracebit; B, the gagebar; C, an index-slide, and D aclamp for confining the whole, in connection with the bit, in theadjusted position of the bar by means oil the screws E and E. The bar Bhas a longitudinal slot, a, which receives the lugs l) Z of the slide O.The said lugs have index-points o c, so that the bar may be adjustedwith them, pointing to the ligure or fractional part ot' the scale Z, toindicate the depth of the hole or holes to be bored. The clamp D hasprojections d d, which form openings e e to receive the shank ofthe bitA. The screws E E pass through the slot a of the bar B and threadedholes of the slide G and like holes in the clamp D, their pointsentering countersinlt-holes in the shank to hold the clamp in its properposition upon the bit. The foot j' ot' the bar B is projected toward theside ot' the bit, as seen in Fig. 2, so as to be brought to nearly orqhite touch it, the adjustment in this direction being regulated bymeans ot' the nut G on the screw E, and the adjustment ot' the latter inthe slide C by screwing it farther through the slide or unscrewing itontw-ard from it, as maybe required, and the screw E being regulated byunscrewing for said adjustment, and afterward screwing it up to hold theparts firmlyin their adjusted position.

I claim as my invention l. The gage-bar B, having a longitudinal slot,a, and footf, in combination with the bit A, clamp D, having slottedprojections cl d to receive the shank ofthe bit, indexslide C, havinglugs dd, adapted to iit and slide in the slot a of the bar B, and thescrews E and E', the former having a nut, Gr, the screws passingthreaded holes of the slide G and clamp D, whereby to conline the bar,clamp, slide, and bit securely together' in the adjusted position ot'the bar B, substantially as and for the purpose set forth.

2.The slide (j, having lugs b b, provided with index-points c, incombination with the gage-bar B, having a slot7 a, to receive the lugs bb, and a l'oot,j', the clamp D, and setscrews E and E, so arranged thatthe slide, gage-bar, and clamp are connected by the screws E and E',substantially as set forth. VILLIAM F. BUTTER. Witnesses:

THOMAS J. BEWLEY, STEPHEN UsTIcK.

through the longitudinal slot a of the bar and

